Apparatus for applying air-blast to ingots.



AFP/xmms mi? Awa" ASE BLAST T0 INGOS.

:UM-V11z 1912.

Pacnted Feb. 2;); 19H3.

L newest ROBERT ABBOTT HADFIELD, OF WESTMINSTER, ENGLAND.

APPARATUS FOR APPLYING AIR-BLAST TO INGOTS.

SpecicationV of Letters Patent.

Patented Feb. 22, 1916.

'Application filed June 13, 1912. Serial No. 703,378. f

To Il vwim/ft 'it may concern.'

Be it known (hat I, Sir RoBEn'r ABBOTT lllunfinnu, knight. a'subjeet of the King of Great Britain and Ireland, residing at Westminster, England, ha veinvented Apparatus for Applying Air-Blast to 1ngots, of which the following is a specification.

My invention relates to an apparatus and arrangement of plant whereby the process of my United States latent No. 933,751, ma), be desirably practised. and the steel in the upper part of the ingot mold may be maintained, immediately after casting, in a fluid condition for a suilicient length of time so that the pipe, commonly present in ingots cast by the ordinary method. will be practically eliminated.

The ingots are preferably cast in molds placed on bogies, trucks or movable platforms, arranged on tracks loading` from the casting pit to the strippers. My invention consists in arranging over said tracks at a suitable point an air pipe, or series of air pipes, connected to a compressed air chamber. or other suitable source of air blast. Said pipes are provided with a series of jets or holes on their under surfaces so thatthe air jets therefrom will impinge on the upper surfaces of the ingots. 1t will be understood that immediately after casting, a layerAof charcoal or equivalent is placed on top of cach ingot, and preferably between it and the, steel a layer of slag. By applying to this the air blast the freezing ol' the molten Steel iS delayed so long that the pipes are eliminated, as aforesaid.

lily invention will be understood by reference to the drawing herewith in which the reference numerals of the description indicate theI correspondiiig parts in all the figures.

Figure 1 is al plan showing the arrange ment of the casting-pit. tracks' and air pipes. Figs. 2 and 3 are reslnetively side. and end elevations showing the bogies and ingot molds in position under the air pipes. Fig. 4 is a vertical section of an ingot mold on the bogie, showing the air pipes in cross section. ["ig. 5 is an enlarged det-ail view in cross sect-ion of the blast pipes 11 and sleeve 16 showing the holes 14 and slots 1 7.

1n the figures l indicates the casting pit, 2 thc ladle on the crane. it; -l the iugot-1nolds into which the molten steel has been poured,

arranged on the bogie Four ingots are shown here on each bogie. ont more or less may be placed on each. l

G is a line of tracks for the bogie which at 7 split into three lines 8 S 8 leading to the Y strippers at about the point 9. Above these tracks are arranged horizontally the. series of blast pipes 11 extending between the cross pipes 10 10 on the upper ends of the vertical supply pipes 12, having valves 13, and leading from the air chamber. Said blast pipes are at such a height that the ingot molds on the bogies will pass freely under them and the air from the holes 14 be free to impinge on the top of the hot ingot, covered by charcoal, etc. As many lines of blast pipes as desirable may be provided over each track. l have shown three.

As shown in Figs. 1 and 2 the air pipes are arranged in sections, so that the blast from each section may be controlled by a valve, for it is not necessary that'the air should flow from the entire length of blast pipes when only a limited number of bogies are passing. For instance as shown in Fig. 2 bogies happen to be in only the right hand section, so only the valve at theright is open permitting 'the jets to escape in that section, but. the other valves areV closed.

1n addition the individual pipes may be fitted with sleeves 1G having perforations or slots 17. or similar means. which sleeves may be rotated to control the escape of air. As however it would be found that with normal working a' continuous line of oogies would be passing underneath the air pipes, that is to say. there would be no break between thc continuity of the bogies, the combustion which is intensified and effected by the'air jets on to the charcoal would be effectively performed and carried out whether the ingots on the bogies were moving or at rest owing to the continuity' of the air holes or jets in the pipes which exert the pressure necessary for proper combustion of the charcoal being atA whatever position the bogies and the molds may happen to be. provided they are within the range of the overhead air pipes.

1t will thus be seen that if the passage of the bogies from the casting pit until they arrive at the, stripper is relatively slow, the overhead air pipes need not be so long as in the case the passage of the bogies from the rate, for it will be evident that in the latter ease the overhead pipes would have to be of greater length than if the bogies 'were traveling under them at a slower rate.

Approximately the time that is necessary for the blast to operate .on the upper surface of the molds, that is to say, from the time they are cast until the steel is suliiciently set to avoid any danger of piping, would be in the case of lrail ingots from about fifteen to. fifty minutes according to the size ofthe 1n.-V

got though this time is only stated approximately. Also, when the rate of progress is known at whicl'ifthe'ingots move fromthe casting pit to the stripper, that is, the time from which the ingots are cast untill-hey can be with safety removed from their molds, the length of the overhead pipes can be easily calculated.

Probably it will he preferable to use three air pipes, these pipes being arranged at such a distance from each other as will enable the three rows of jets to play upon the molten steel which formstl'ie heads of the ingots.

The height from the track to the upper side of the runner bonsliouldvbe approxi4 mately the same in erf-ely case so that the Vair jets have the same heating effect on' every ingot.

When the bogles arrive at the stripper, the ingot molds are lifted and theI ingots removed from `the molds intheusual manner, preferablyY retaining Ithe iigots in avert-ical position during tlie :;process` of stripping.

Considerable modilication 'of this arrangement can be'made asmay be desired. lngots may he cast in this .way 'with either their large or small end atfthe bottom, or with their large o rsmall end at the top, Whichever may be preferred, or jiiractically. paralsize,sectio n,'or shape.; .Y .c

This method 'may be also applied to the production of catingso various types.

)Ido notpropose to limit myself to the exact form and arrangement of parts here shown for .instance-'it is not necessary.' that lel ingots'mav be produced of any desired the tracks-should extend straight "from the casting; pit to 'the strippers, they may be 'curved and the correspondingly erranged. l y i I shown in Fig. 4, 20,-are the trunmons of the ingot mold, 2l the'heado sand or other non-conducting materialin the metal ring having trunnions The ingct is shown cast large end up but this may be reversed.

Lirama air on the ingots during their progress to the stripper, and means for moving the. ingots along under tlie'air supply. Y an apparatus for supplying air blasts for producing heat to feed ingots compris- 7g ing suitable supports, air conductors carried hy said supports, said conductors having outlets arranged in a line to permit impinging of the blasts on the ingots dur-f ing transit thereunder, and means for moving the ingots along under the air blast.

An apparatus for causing airjets to imping'e on ingots immediately after casting, comprising a track from the casting pit to the strippers for bogies carrying the ingot molds, a. series of vertical pipes, cross-pipes on the vertical pipes, a-series of parallel, horizontal blast pipes, jconneeted to the cross pipes and arranged over the track at such a height'thatthe bogies and ingot molds will pass under them, said blast pipes being perforated on their under surfaces, and air valves in the vertical pipes.

4. in apparatus for causing air jets to impingc on the upper ends of ingots in the molds `nediately afm-roasting to eliminate pipifs, comprising a series 'of tracks from the cz pipe to the strippers, bogies or tracks on said tracks for carrying /the ingot molds and the ingots thereima' series of vertical air pipes arranged adjacent the tracks and connected tothe source of airsupply, a series of lateral air pipes arranged on the upper ends of tliejvertical pipes and across the tracks, air valves in vthe'v 100 vertical' pipes and a series of para1lel, h orif aontal blast pipes connected to the cross* pipes, arranged above each tracl '.andeili-v tending longitudinally of vthe tracks, said blast pipes being` perforated on their lower surfaces and being arranged at Such 'a height that the ingot molds on the Abogies will pass beneath them but-the upper .ends of Ythe ingots will be adjacent thereto 'said\ air pipes being connected in sections, that the air may be out oli' from each section separately, substantially as described and shown. l

An apparatus for' supplying ailq blast to ixnpinge on ingots immediatelylv after casting, comprising longitudinally extending air conductors so arranged as to cause the -ir to impinge on the ingots while the latter are being moved adjacent the conductors.

6. An apparatus for supplying air blasts to impiuge on ingots immediately after casting, comprising longitudinally' extend ing` Iair conductors having longitudinal openings at one side and so arranged as to 'mit air from t openings to impinge on while the latter are being moved fut the conductors. f

for lsupplying air blasts on .ingots immediately after iro ,1 ill te mp casting comprising longitudinally extend` .ing elevated air conductors, provided with jets on their under surfaces to permit air to imp'nge on the upper ends of ignots im-A mediately after casting to eliminate pipes, comprising the casting pit, a series of tracks leading therefrom, trucks or bogies on the tracks, ingot molds and ingots on the trucks, means to move the trucks along the tracks and means to apply a blast to the upper ends of the ingots as they are moving.

10. An apparatus for causing air jets to impinge on the upper ends of ingots in the molds immediately after casting to eliminate pipes, comprising the casting pit and the strippers, a single track from the casting pit, said track splitting into aplurality of line-s extending to the strippers, vsuitable supports, a plurality of series of air blast pipes carried on said supports at such a height above the tracks that the trucks with the ingots thereon will pass under the pipes, said pipes being arranged one series centered over each line of tracks, the pipes having perforations on their lower surfaces and, means to supply compressed air to thevplpes.'

11. An apparatus for causing air jets to impinge on ingots immediately after casting, comprising suitable tracks, bogies on the tracks, ingot molds on the bogies, a series of pipes arranged over the tracks at such a height that the bogies and ingot molds Will pass under them, said blast pipes being perforated on their under surfaces, and connections between the blast pipes and the source of air supply.

12. An apparatus for causing air Ajets to impinge on ingots imn'iediately after castA ing, comprising a suitable track, bogies on the track, ingot molds on the. bog-ies, a series of vertical air pipes, cross pipes connecting the vertical pipes, series of blast pipesA connecting the cross pipes and arranged over the track at such a height that the bogies and ingot molds will pass under them, said blast pipes being perforated on their under surfaces, and air valves in the vertical pipes.

13. An apparatus for causing air jets to impingc on ingots immediately after casting, comprising casting' pit, tracks therefrom, bogies on the tracks, ingot molds and ingots on the bogies, a series of vertical air pipes, a series of blast pipes supported on the vertical pipes and connected thereto and arranged over the tracks at such a height that the bogies and ingot molds will pass under them` said blast pipes being perforated on their under surfaces, and means to open and close communication between the source of supply and Vthe vertical pipes.

14. An apparatus for causing air jets to,

impinge on the upper ends of ingots in the molds immediately after casting to eliminate pipes, comprising thc casting pit and the strippers, a series of tracks from the casting pit to thc strippers, bogies or trucks on said tracks, ingot molds and the ingots on the bogies, a series of substantially vertical, supporting pipes arranged adjacent the tracks and connected to the source of air supply, a series of lateral air pipes arranged on the upper ends of the vertical pipes and across the tracks, air valves in the vertical 'pipes and a series of substana plurality of lines extending to the strippers, bogies or trucks on said tracks for carrying the ingot molds and the ingots therein','a series of vertical air pipes-arranged adjacent said lines of tracks and connected to the source of air supply, a series of lateral air pipes arranged on the upper ends of the vertical pipes and across the tracks, and aA series of parallel, horizontal blast pipes'connected to the cross-pipes, arranged above cach track and parallel thereto, said blast pipes bein perforated on their lower surfaces and eing arranged at such a height that the ingot molds on the bogies Will pass beneath them but the upper ends of the ingots will be adjacent thereto, said air pipes being connected in sections, that the air may be cut o from each section separately, substantially as described and shown. Y

Signed at 22 Carlton House Terrace,

llfestminster, England, this twenty-ninth,

day of May, 1912..

ROBERT ABBOTT HADFELD. Witnesses z 'WAL O. BnowN,

17mm, W, FRrTcHUI-n 

